$\sinh\left(a+b\right)=\sinh\left(a\right)\cosh\left(b\right)+\cosh\left(a\right)sinh\left(b\right)$

$3x^2-4x+7$

$\left(2a+b-c\right)^2\left(3a-2b-2c\right)^2$

$2+432x^3$

$2\cdot\left(x+2y\right)^2-\left(x-2y\right)^2+\left(x+2y\right)\cdot\left(x-2y\right)$

$\frac{x^3-4x^2-9}{x-3}$

$\int\left(3y^2+6y\right)^3\left(y+1\right)dy$